You solved 200+ questions.
But do you actually know what you're weak at?
GrindLens checks your actual LeetCode history, tracks your progress across sheets, and tells you what to solve next.
Weakest Pattern: Sliding Window
4 high-effort failures due to window contraction logic. Solve these 3 ladder problems to build pattern mastery.
THE DIAGNOSTIC PHILOSOPHY
Three things you won't get from a raw solved count.
Covered ≠ Solved
Solving 10 easy questions under a topic doesn't mean you've covered it. GrindLens audits failure frequency, edge timeouts, and problem variety under real interview conditions.
Evaluates depth, not tag vanity
Weak ≠ Unexplored
Never penalize a topic you haven't opened yet. GrindLens strictly separates verified struggle (repeated failed attempts) from unexplored territory. Your weak spots are real gaps, not arbitrary blanks.
Zero unfair penalties
More Problems ≠ Better Prep
Endless question grinding leads to cognitive fatigue. GrindLens isolates your weakest pattern and delivers a targeted 3-problem ladder to fix the conceptual bottleneck.
Targeted 3-problem queue
Built for your entire coding journey.
GrindLens begins with LeetCode public profiles, but your pattern mastery shouldn't be trapped on one site. Support for Codeforces, HackerRank, and custom company question lists is expanding your unified practice graph.
ARCHITECTURE & DATA PRIVACY
Transparent, read-only engineering.
GrindLens only accesses public submission data. We never ask for your LeetCode password, session tokens, or private credentials.
Without an account, no profile data is persisted. Public lookups are not saved to the database.
Logged-in members can toggle their profile between public and private with one click in settings to prevent external lookup.